Elevating-truck.



`D. HENNESSY.

-ELEVATNG TRUCK.` APPLICATION man APR129`. 1913.

Patented 001.1011916. 1

SSHEETS-SHEETI. 1

anvar evs 1 QR 1 l D. E." HENNESSY.

ELEVATING TRUCK.

. 2 m, W m ww (n. om /MM d m m 5., am m p T,

DJ E. HENNESSY.

E11-WANN@` TRUCK.

APPLiCATlON FILED AP?. 29, 1913.

Patented out. 1o, 1916. 5 SHEETS-SHEET 4 www y; wxs sg, 1

D. E. HENNESSY.

ELEVATING` TRUCK.

APPLICATION FILED APR.29. 1913.

Patented 061. 10, 1916.

5 SHEETS-*SHEET 5 N UNITED {STAT-Es. PATENT oEFioE.

DANIEL E. HENNEsss-r, or HoLYoKE, MASSACHUSETTS, nssIGNon, BY MESNEassIoN- MENTS, To HERBERT-w. cowaN, J. LEwxs wroizoifii,l am) EDWARD N.WHITE, as

TBUSTEES.

To all'whom it may concern: f

' Be it known that I, DANIELE. HENNEssY, .afcitizei of theUnited States,residing at Holyoke, Massachusetts, have invented certain new and usefulImprovements in Eleincorporate a jack in an elevating truckthat,

f liwithout in any way sacricing compactness and lowness in the truckconstruction2 a most eective utilization of the multiplying power of thejack may be obtained. f

In the illustratedy preferred -embodiment of the invention I have so`arranged a laterally rigid, longitudinally extensible l)ack between thebase or frame of an elevating truck and the part or parts to be actedupon lby the jack, that the thrust of the jack ``s exerted substantiallylengthwisel of the ltruck and at all times. directlyupon the parts towhich therelative lengthwise movement is to be imparted, the jackadjusting itself auto# matically` and bodily to the differentrelativepositions of said parts.

An important feature of the invention is the arrangement of a jack ofthe type hereinabove referred' to between the base or frame of anelevating truck and the part or parts to be acted upon by the ]ack, insuch manner that the jack is wholly supported by pivotal connectionsbetweenits respective v y members and the parts upon which it exerts itsseparating thrust, and is arranged to telescope between'` said pivotalconnections, whereby it does not add materially -either to the length orto the height of the truck construction, the `jack lying at all timesbelow the top and within the endsy of the truck.

Other objects and important features of the invention will appear fromthe following description and claims when considered in connectionwiththe accompanying drawings, in which Figure 1 is a plan'view of oneconstruction of truck in accordance with the present invention; Fig. 2is a side elevation of the same; Fig. 3 is a longitudinal section on theline 3-B, Fig. l, illustrating suitable means which may be adopted tolcoperate with ASpecification of Letters Patent. Application inea prix2a, 1913. `serial No. 764,322.

vating-Trucks,` of which thefollowing is a side rails of the upper frame20.

ELEVATING-TBUGK.

patented oet.' 1o, 191e.

the power means `with a view-to elevating t and ylowering the platform;Fig. 4 is an enlarged transverse section of the same on the line 4 4,Fig. 3; Fig. 5 isan enlarged transverse section on the line 5-5, Figs. land 2; Fig. 6 is a longitudinalcentral section of power means comprisinga pump and liquid pressure means adapted to the present invention; Fig.7 is a` longitudinal section 'of a modification of the apparatus 'shownin Fig. 6; Fig. 8 is a detail view of a plunger head shown; in Fig. 7;Fig. 9 is a transverse section on the line 9 9, Fig. 6; Figs. 10 and 11are respectively a plan view and a side elevation of amodiliedconstruction of truck; Fig. 12 is a detail plan view of a memberadapted tothe said modicaltion; Figs. 13 and 14 are respectivel a'planand side elevation of another modi ed construction of truck. V

Referring to Figs. 1 and"2, vthe base 10 of the truck may be of anysuitable con struction and is shown as provided with "Tear wheels 11 anda front caster-wheel 12 lwhich is supported in a caster-frame 13: bymeans of an axle pin 141.` Said caster-frame is provided with `avertical swivel pin 15 which journals in a suitable bearing 16 in abracket 17 extending upwardly and forl means by which a longitudinalextension of the jack is converted into a rising or lowerring movementyand by which this movement` is transmitted to any suitable goods-supportor platform. In the illustrated construction the base comprisesangle-iron side bars 21, and the upper frame comprises angle-iron sidebars 22. A rear `.crossfbar 23 and a front cross-piece .24 connect theend portions of the sidebars 21 of the base,'and Ifront and rearcross-bars 22a and 22", respectively, connect the end portions of theFrom an inspection of Figs'. and 5 of the drawings, it will be notedthat the upper and lower frames are so constructed that one telescopeswithin the other when the Cil upper frame is brought into its loweredposition, thereby contributing both to the compactness and to thelowness of the truck construction. It will be seen that the upper framerests upon the base and may be raised or lowered through theintervention of suitable mechanism. Obviously the upper frame may beraised directly upwardly and lowered directly downwardly relatively tothe base, but in the preferred form of the present invention, the u perframe is adapted to be raised througi the application of ower which isso applied that through the intervention of suitable mechanism betweenvthe base and the upper frame, the upper frame is elevated and atthesame time the base and upper frame are shifted longitudinallyrelatively to each other. One means for-accomplishing this when power issuitably applied is shown in Figs. 1 to 5 inclusive. Paired front links25 'and paired rear links 26 are provided and these are connected withthe upper frame, to which end the links 25 are pivotally supported bypivotsY 27 mounted in suitable brackets or hangers 25n at the lower sideof the front portion of the upper frame', and. the rear links 26 girepivotally supported onpivots 28 which*`- are mounted in brackets 26asuitably secured to the rear portion of 'said upper frame. Each link 25,26 isA provided at its rear end with an anti-friction roller 29, whichrollers are adapted-to travel upon the horizontal members or rails ofthe side bars 21 of the base. Adjacent the links 25, 26 are wedges'30,31 respectively at the front and rear of the base, these wedges beingfixed stationarily to said base, and provided respectively with guideslots 32, 33 which extend longitudinally of the base, and in these guideslots the said anti-friction rollers 29 are adapted to travel.Intermedi* ate ofthe ends'of the links 25 and 26, friction rollers 34,35 respectively are provided, and these rollers 34, 35 may travelrespectively upon the inclined surfaces of thewedges 30, 31. It will beseen that when the vupper frame is lowered `the said linksand'correlated parts are in the position shown in full lines, and when theupper frame is elevated they are fin the position shown in dotted lines,power being so ap' plied to the base and upper frame that the .latterare shifted longitudinally relatively to each other, while the linkconstruction is adapted to gradually rai-se said upper frame. It will beseen that the rollers 29 are guided rearwardly in the slots 32, 33 andthat they cannot rise, whereas the wedges 30, 31 acting upon the rollers34, 35

gradually raise the links into the inclined position shown in dottedlines, the said' rollers 29 serving as fulcrums. This'link mechanism isshown andclaimed in a copending application led by George P. Taylor onDecember 9th, 1912, Serial Number 735,691.

Revertin to Figs. 1 and 2,l which illustrate suita le power means, apump 36 is provided which is adapted to force pressure iuid or liquid toa liquid pressure device or hydraulic jack 37. The said pump comprises acylinder 3C?l which is pivotally connected with the base 10 through themedium of arms 3H at the forward end of said cylinder 36u and )ivots 39which are carried by bracket mem'ers 40'suitably secured to the innersides of the side bars of the base.

The liquid pressure device or hydraulic jack 37 provided with a ram 41,and a bracket 42 1s secured to the rear cross-piece of the upper frame,while a pivot 43 connects .the

said ram 41 with said bracket 42. It will A suitable construction ofpumpand jack or liquid pressure lmeans is ,illustrated in Fig. 6. Thepump cylinder 36a is provided with a small bore or liquid chamber 44,while at the forward end of said cylinder a larger bore or liquidchamber 45 is provided. A plunger 46 guided inthe pump is provided witha sucker head 47 of any suitable construction, and for the purpose ofguiding the plunger land closing the chamber 45 of the pump cylinder, acap 48 is screwed into the end of the pump cylinder and provided with abushing 49, constituting part of a stuffing box in which and in aportion of said cap 48 the said plunger 46 is guided. Carried by theplunger 46 outside the pump cylinder is a forkv50 with which theoperating mechanism of the pump is connected as later' described, andwhich provides a lug or toe outside the pump cylinder for the purpose ofactuating the valve mechanism. Any suitable valve mechanism may ofcourse be provided which is adapted to be actuated by thesucker head'47and4 the lug 50. The valve means shown comprise valve stems 51 and .52which are guided in alinement with each other and which are normallyseparated. The `valve stem 52 moves in a liquid or fluidpassage 53formed by a bore in the sidewall of the pump cylinder and whichis'provided with a seat 54 for a valve 55 which is mounted on said whichis seated againstl a bushing 58 which is screwed into the pump cap 48and forms art of a stuffing box, said valve Vstem 51 eing guided in saidbushing. The tendency of the spring 57 is to draw the valve stem 51outwardly. Said valve stem 51 may well be designated a pusher rod, andis held normally separated from "the adjacent'end pf the alined valvestem 5 2 by the action of said spring 57. The inner end of the passage53 is enlarged and by means of a port 59 in the inner wall of thecylinder 36.3 it communicates with the pressure chamber 59a of the.pump, andin this enlarged cham- 'fber portion a grooved elongated valvemember 60 is arranged and carries a valve 61, said member 60 beingguided longitudinally by the wall of the passage 53 and its groovesserving to conduct fluid or liquid between itV and the Wall of saidpassage as shown in Fig. 9. At the enlarged end of thepassage 53 a seat62 is provided for valve 61, while a valveI ystem 63 carried by saidvalve and surrounded by a spring 64: is arranged in a blo-ck 65 whichisprovided with a ,passage or chamber 66 which surrounds saidfspring andvalve stem.k The said block ,65 is Y screwed into the end ofthe pumpcylinder 36, said block being providedwith an angular passage 67whichpommunicates with the chamber or passag`66. Into the screwthreadederd 361 of the pump' cylinder is i screwed the cylinder 68 whichreceives and guides the ram 4.1. which, together with the` said cylinder68 and concomitant parts, provides a hydraulic jack or fluid or liquidpressure means.

Again referring to Figs. 1 and 2, a link 69 is pivoted at one end to theplunger fork 50 and at the other end it is pivotally connected with thelower arm of a' lever 70 which is pivoted at 71 to the forward end ofthe base of the truck. To the upper arm of said lever 70 is pivoted alatch 72 which is provided at its outer end with a recess which may beformed by a hook 73, and said latch may be operated by means of a lingerieee or lip 74, to enable the hook end o vthe latch to be' engaged withand disengaged from a stud 75 at one side of the tongue 18.`

As shown in Fig. l, thelatch construction may be duplicated, that is tosay theremay e be latching means arranged at both sides of thebifurcated end 19 of the tbngue. Obvihandle or lever adapted to actuate`the pump when-connected with the pump plunger as described. Obviouslyalso when the latch 72 is disengaged from the tongue, the latter may beused as means for steeringand guid-- ing the truck upon the caster-wheel12. In dotted lines the latch 72 is shown in a disengaged position. Y

In Figs. 1, 2 and 6, means are shown for weighing the load which 1splaced on the the said tongue 18 constitutes a pump4 truck.V The samecomprises a flexible tube' or hose 76 which at one end is connected'with a. port 77, which extends into' the pressure chamber 68a of thejack, and at the other end is connected with a registering scale 78suitably supported upon the base of the truck. y

In Fi 7 a modified form of pump and jack is s own. A pump cylinder 79 ispro- `with apassage 87 which connects at one end with the chamber 80,its other end leading to a bore or passage 88. A valve 89 is seated atthe inner end'of the passage 88 and is provided with a stem 89a insertedin said passage, which latter is closed' at its outer end by screw plu90. Plunger head 84C has an inclined or eveled surface 91 which isadapted to come in contact with a conical disk 92 which is arranged onan extension stem 93 from the valve 89, which stem 93 is guided ina bore94 in the pump cylinder wall. Prolongated abutments 95 extendlongitudinally from the head 84, at opposite sides of anotch or recess96 which receives the stem 93, so that the pump plunger ,may be operatedwithout interfering with the stem' 93 andthe parts supported thereby.This construction is more clearly shown in Fig'. 8. A valve 97 isadapted to rest against a seat 98 formed in a screw block 99 which isscrewed into the end of the pump cylinder. The valve is kept seated bymeans of a, spring 100 which is located in a block 101, and saidvalve isprovided with a stem 102 which` is suitably grooved so that fluid orliquid may be forced through passage 103 inv said block 99, in whichsaid valve stem 102 is guided; Ram cylinder 104 is formed as anextension of the.. pump cylinder 79 and receives and guides the ram 105,which oper-V yates ina chamber 106.

The operation of the improved truck de'- f scribed is as follows: Thetruck is pushed under the load to be raised, and thereafter the tongue18 latched to the pump mecha-` nism. Referring to Figs. 1, 2 and 6,v theton e 18 which now constitutes a pump handle is `oscillated so as toimpart a pumping action, the range of each oscillation beingl such thatthe `valve 55 is opened and closed by suction and pressure, without they necessity of striking the adjacent end of the elongated valve member60. It will be seen that the outward movement of the plunger head 47will suck the liquid contained in the the eiiect of pushing on 4theupper frame and on the ase in opposition, so that through theintervention of the link mechanism described or its equivalent, theupper frame is gradually elevated. It will be noted that during theelevating movement, the pump and jack will be movedy on their pivotconnections with the base and upper frame into the position-shown indotted lines in Fig. 3, the thrust of the jack being at all times alonga straight line through said pivots. When the load is to be deposited atsome other point, ythe pump handle 18 is quickly oscillated through awider range of oscillation than when pumping, with the result that thevalve stems 51 and y52 are given a greater movement suiiicient to bringthe stem and -va'lve 55 in Contact with the adjacent end ofthe elongatedvalve member 60, whereby the valve 61 is positively opened. The pump-handle is held-lowered for a sufficient lengthof time to hold the valve61 open, while the Weight imposed upon the ,ram 41 will cause the latterto force the fluid or liquid in the jack chamber 68a back into the pumpchambers and passages, the jack no'w acting as a fluid jack or dash-potto prevent too rapid descent of the load. The latch device may now bediscon` nected from the handle or tongue, and the' latter can now beused for the purpose of moving the truck out from under the load andsteering the same to any other desired point.

In the modified form of pump and jack shown in Fig. 7, the action is asfollows: The oscillation of the tongue which is at the timeconverted-into a pump handle, recipro' cates the plunger or piston 82,-and the range of oscillation of the handle is such that-the abutment 95does not come in contact withthe valve stem 102. It will be noted thatthe space between the abutment 95 and the said stem 102 is greater thanthe space between the beveled portion 91 of the head 84 and thetaperingdisk 92. During the ordinary pumping action, valve 89 is opened bysuction-without the necessity of being positively opened by beveledfaces 91,

92. But if the upper frame is to be lowered, the pump handle' is quicklyswung downwardly witha greater range of movement than when pumping, withthe result that not only is the valve 89 unseated, but the abutment 95comes in contact with the valve stem 102 and positively opens the valve98, so that the liquid in the jack chamber 106 is forced by the ram backinto the pump.

Wheels 11 at the rear of the truck may be supported in any suitablemanner as by means of an axle 11a supported in bearing boxes 1.1h whichare clamped or secured between transverse angle plates 11c and 11d whichconnect the side bars of the base. See 1 'Figs 1, 2 and 3.

A modified form of truck is illustrated' in Figs. 10, 11 and 12, andthis will be briefly described,the parts not described in thisconnectionbeing substantially thel same as in the" construction beforedescribed. The pump 107 has its plunger 108 connected pivotally with theupper arm of a lever 109 which is pivoted at 110 to an underhangingportion of the truck base, the other arm of said lever being pivoted toa link 111 which in turn is pivotally connected with a slide 112 guidedlongitudinally of the truck by means of a guide 113 supported on thebase. The combined tongue and pumphandle'is provided with a head 114 atits pivot end, with which the said slide 112 may be con'- nected or fromwhich it may be disconnected at will. To this end the said slide isprovided with pins 115 which are adapted to be engaged in notches 116produced by a slot in said head ,114, which is crossed by mea-ns of aslot 117. The slot 117 permits of the oscillation of the handle, seedotted line in Fig. 11 illustrating the bottom of slot 117.

Referring noW to F igs.'13 and 14, another 4modification of theinvention is illustrated.

` Hereinthe pump 118 may be of any suitable quickly oscillate the lever126, the pump and jack may be operated, a spring 127 being `employed toreturn. the lever 126 after each depression by the foot. It will benoted in this modification that the tongue of the truck is at all timesindependent of the power mechanism, that is to say the latter may beoperated without using the tongue ofthe ltruck for that purpose. Thetongue will therefore be free at all times, if the specific modificationis used, unless of course the same be linked up in any suitable manf nerto the lever 126.

From an inspection of Figs. 2 and 1l of the truck, that when thejack-swings dur ing the elevatingoperation, there is no sub` stantialprojection of any portion of the jaclior rpump below the lower frame. Itwill thus be seen that the truck body, when the parts are in loweredcondition, has yvery small vertical dimensions and that by reason of theconstruction of the elevating mechanisn and the mounting of the )ack andpump,low supporting wheels may be used in connection with thebody. Itwill be noted, also, that all parts of the jack and pump lie within theends of the truck in 4all positions of the elevating ,meclianism.

Obviously the invention as defined by the claims not only comprehendspower means capable of working under liquid pressure, but any otheriiowing medium such as air or gas, and the word liquid or other wordcovering such a medium `as used herein and in the claims is to beunderstood as covering such a medium either singly or combined.`

Various means may be employed for supplying operating iiuid underpressure `to the power means. In the preferred embodiment, such meanswill be mounted on the truck.

Obviously this invention is susceptible of a wide range of modification,some of which modifications are illustrated, as parts may be omitted,parts added, or parts substituted and diiierently constructed withoutdeparting from the spirit and scope of the lnven- `tion as defined inthe claims.

What I claim is 1. In anelevating truck, in combination, a base,elevating means comprising means movable both lengthwise of said baseand up and down with respect thereto and means whereby such lengthwisemovement `effects the up and down movement, and a laterally rigid,longitudinallyextensible jack having its respective members pivotallyconnected to said base and to said means movable lengthwise ofnand upand down upon said y base, said jac being wholly supported by saidpivotal connections and being constructed to telescope between saidconnections.

' 2. In an elevating truck in combination, a base elevating meansLcomprising means movable both `lengthwise of said base and up andl downwithv respect thereto, said means being so mounted upon said base thatthe lengthvvise movcmenteiects the up and down movement, a laterally"rigid, longitu- .idinally extensible fluid-operated jack having itsrespective members pivotally connected toA said base and to said meansmovable lengthwise of and up and down upon said movable both lengthwiseof said base and up and down with respect thereto, said means being somounted upon said basethat the lengthwisemovement effects the up anddown movement, a laterally rigid, longitudinally extensiblefluid-operated jack having its respective members pivotally connected tosaid base and to said means movable lengthwise of and up and down uponsaid base, apump carried by said jack for supplying operating fluidthereto under pressure, said jack and pump being wholly sup- ,V portedby said pivotal connections, a handle for moving said truck, and a linkwhereby said pump may be connected to said truck handle for yoperationthereby. 4. In an elevating truck, a base, elevating e .means comprisingparallel links pivoter?y r upon said base and means for maintainin; thesubstantial parallelism of said link 5.` throughout their pivotalmovement, and a laterally rigid, longitudinally extensible, jack havingits respective members directly pivoted upon said base and upon saidparallel link elevating means 'at points spaced 100 lengthwise 4oi.saidl truck, said jack being wholly supported by saidconnections wherebythe thrust of said jacky isy at all times along a straight line betweensaid pivots and being constructedto telescope between `said pivots intoa position in which it`lies lengthwise of the truck, below the top andwithin i the ends thereof.

' tively to said horizontally relatively movable parts, said jack beingwholly supported by said pivotal connections below the top and withinthe `ends of the truck andl being 12o constructedto telescope betweensaid connections. 1

I 6. .In an elevating truck, in combination,

a base and an upper frame, 'means whereby relative horizontal movementof said base and said upper frame eiiects a separation thereof, meansfor effecting said relative horizontal movement comprising a laterallyrigid fluid-operated jack having longitudinally separable memberspivotallyconnecta base and an upper frame, means for effecting aseparation of said base and said upper frame comprising means movablelengthwise of said base and means for causing such lengthwise movementto eil'ect the movement of separation, and a laterally rigid,longitudinally extensible jack having its respective members pivotallyconnected to said base and to said means movable lengthwise `of saidbase, said jack being wholly supported by said pivotal connections below4said lengthwise movable means and within the ends of the truck andbeing constructed to telescope between said connections.

8. In an elevating truck, in combination, a base and an upper frame,means for effecting a separation of said base and said upper framecomprising means movable both lengthwise of saidl base and transverselythereto, and means whereby such lengthwise movement eifects thetransverse movement, a laterally rigid, longitudinally extensible{luid-operated jack having its respective members pivotally connected tosaid base and to said means movable lengthwise of and transverselytosaid base, said jack being wholly vsupported by said pivotalconnections, a pump carried by said jacky for supplying operating fluidthereto under pressure, a handle for moving.y said truck and a linkwhereby said pump may be connected to said truck handle for-operationthereby.

9. In an elevating truck, in combination, a base and an upper frame,connections between said base -and said upper frame whereby a relativeshifting movement in parallelism eHects a separation thereof, and a jackfor effecting the combined shifting and separating movement of said baseand said upper frame, said jack having its separable parts respectivelypivoted to said base and -to said upper frame at points spaced along thepath of shifting'movement and being constructed to telescope. betweensaid connections arranged to swing between a position lengthwise of thetruck when the truck is in lowered condition and an oblique posi.- tion,whereby it accommodates itself both to the telescoping and to theseparating movement.

l0. In an elevating truck, in combination, a base and an upper frame,connections between said base and said upper frame whereby a relativeshifting movement effects a f separation thereof, and a jack comprisingseparable parts confined for rectilinear relative movement, one ofsaldparts being piv-v means whereby such lengthwise movementv effects the upand down movement, a laterally rigid, longitudinally extensible jackhaving its respective members pivotally connected to said base and tothe means movable lengthwise of said base, said jack being whollysupported by said pivotal connections and being constructed to telescopebetween said connections, and reciprocating means for effecting theextension of said pjack, carried by said jack and effective for thispurpose for a stroke of any length between its limits of reciprocation..

12.' In an elevating truck, in combination, a base, elevating meanscomprising means movable bothv lengthwise of said base 'and up and downwith respect lthereto, and means whereby such lengthwise movementeffects the up and down movement, a laterally rigid, longitudinallyextensible jack having its respective members pivotally connected tosaid base and to the means movable'lengthwise of said base, said jackbeingl wholly supported by-said pivotal connections and beingconstructed to telescope between said connections, and means foreffecting the extension of said jack, mounted on said jack'and arrangedfor rectilinear reciprocatingy movement along the line of extension. f

13. In an elevating truck` in combination, a base, 'and`elevating means,comprising means movable parallel to said base and means whereby suchparallel movement effects a separation of said base and saidaforementioned means, a jack for effecting said movements, said jackhaving its respective members pivotally connected to said base and tothemeans movable lparallel tov said base, being wholly supported by saidpivotal connections and being constructed to telescope between saidconnections, a pivoted truck handle, and connections between said jackand said truck handle whereby movement of said handle about its pivoteffects the extension of said jack.

14. Inan elevating truck, in combination,

a base, elevating means comprising means t lengthwise movement effectsthe up and ISD ing its respective members pivotally` conf nected to saidbase and to said means movable lengthwise of said base and arranged toktelescope between said connections, a pump rigidly connected to saidjack. and comprising apiston movable alon the line of extension of saidjack and a cy inder located between said pivotal connections, said i`jack and pump being wholly supported by said pivotal connections.`

15. In anelevating truck, in combination, a base, elevating meanscomprising means movable both lengthwise of said base and up and downwith respectthereto, said means being so mounted upon said base `thatthe lengthwise movement effects the up and down movement, a laterallyrigid, longitudinally extensible jack havin its'respective memberspivotally connecte to said base and to said means movable lengthwise ofsaid base,` said jack being `wholly supported by said pivotalconnections and lying within the ends of the truck when the elevatingparts are in lowered position, and means comprising a member pivotedupon said base for eifecting the extension of said jack.

16. In an elevating truck, in combination, a base and an upper lframe,means whereby relative lengthwise movement of said base `andvsaid' upperframe eiects the separation thereof, a laterally rigid, longitudinallyex tensible jack having its respective members pivotally connected tosaid base and to said frame, said jack being wholly supported by saidpivotal connections and being yconstructed to telescope `between saidconnections, a truck handle and means for eecting the extension of saidjack' arranged to be connected at will to Vsaid truck handle for i thispurpose.

17. In an elevating truck, in combination, a base and an upper frame,means whereby relative lengthwise movement of said base and `said frameeffects the separation thereof, and means for effecting such movementcomprising a laterally rigid, fluid-operated jack and ,a pump forsupplying operating iluid thereto, said jack having its re spectivemembers pivotally connected to said base, and to said frame and saidpump be-4 ing carried by saidjack and beingarra'nged to swing with saidjack upon lsald pivots, and means mounted on said base for operatv ingsaid pump having connections withsaid p thereof, alaterally rigid,longitudinally exi pump constructed to permit the movement of said pumpwith said ack.

1S. In an elevating truck, in combination,

a base and an upper frame, meanswhereby i relative lengthwise movementof said base and said upper frame effects the separation tensible jackhaving` its respective members pivotally connected to said base and tosaid frame, said .jack being wholly supported by said pivotalconnections and being located entirely below said upper frame, and meansfor effecting the extension of said jack com- .pivotally connected tosaid base and to said frame, said jack being entirely confined betweensaid base and said frame and being constructed to telescope between itspivotal connections, `and means for effecting the extension of said jackcomprising a lever fulcrumed upon said base.

20. In an elevating truck, in combination,

a base and an upper frame, means wherebyrelative lengthwise movementofsaid base and said uppery frame effects the separation thereof, alaterally rigid, longitudinally extensible fluid-operated jack havingits respective members pivotally connectedto said base and to saidframe, said jack being entirely conined'between said base and said frameand being constructed to telescope between its pivotal connections,means for ef- `fecting the extension of said jack comprising apumpcarried by said jack for supplying operating fluid thereto, and -alever ulcrumed upon said base for operating said pump. j

21. In an elevating truck, in combination, a base, an upper frameadapted to move upwardly and downwardly in parallel relationship withrespect to said base, means for converting a longitudinal movement oflSaid framefint'o a vertical movement thereof in y moving said frame upand down, a jack a substantially horizontal position when said frame islowered.' v

22. In an elevating truck, in combination, a base, an upper frameadapted to move upwardly and downwardly in parallel relationship'withrespect to said base, means for converting a longitudinal movement'ofsaid frame into a vertical movement thereof in moving said frame up anddown, a jack mechanism for moving said frame comprising telescoping jackmembers formingv ay laterally rigid rectilinearly extensible connectionbetween said base and frame, one

jack member being pivotally connected to said base and the other jackmember being pivotally connected to said frame atpoints spaced along thepath of longitudinal movement and being arranged to telescope betweensaid points, whereby said jack is adapted to fold between Asaid frameand said base into a substantially horizontal position when said frameis lowered, step by step operating mechanism for extending said jackmembers and a manually operated lever for actuating said step by stepmechanism. A i

23. In an elevating truck in combination, a base, an upper frame adaptedto move upwardly and downwardly in parallel lrelationship with respectto said base, means for converting a longitudinal movement of said frameinto a vertical movement thereof in moving said frame up and down, ajack mechanism for moving said lframe comprising intersliding jackmembers forming an extensible connection between said base and frame,one jack member being pivotally connected to said base and the otherjackmember being pivotally connected to said frame, said intei'slidingjack members arranged in a fore-and-aft direction diagonally betweensaid parallel frame and base when said frame is raised and adapted tofold between said frame and base into a substantially horizontalposition. when said frame is lowered, a step by step operating mechanismfor extending said jack members, a steering wheel for said truck, asteering handle therefor and mounted thereon -for an up and downmovement, and means for connecting said steering handle with said stepby step operating mechanism for actuating the same by hand.

l 24. In an elevating truck in combination, a base, an upper frameadapted to move upwardly and downwardly in parallel relationship withrespect to said base, means for converting'a longitudinal movement ofsaid frame into a. vertical movement thereof in moving said frame up anddown, a hydraulic jack mechanism for moving said frame comprising a ramchamber and a ram slidable therein, and lconnected one to said framewith a pivotal connection and one to Said base with a pivotalconnection, said ram and ram chamber arranged in a fore-and-aftdirection diagonally between said parallel frame and base when saidframe is raised, and adapted to fold between said frame and base into asubstantially horizontal position when said frame is lowered,hand-operated pumping mechanism for pumping Huid into the ram chamber inextending said ram, and means' to release the pressure of said fluid-and allow said ram to slowly return into said ram chamber in loweringsaid frame.

25. In an elevating truck, in combination.

supporting wheels, an axle upon which said wheels are mounted, atruckbase comprising a frame carried by Said axle between said wheels,an upper frame, and elevating means between Vsaid frames comprising alat-f `first mentioned frame, and means for effecting an elevation ofsaid upper frame, comprising a laterally rigid jack carried-by saidlirst mentioned frame between the sides thereof and arranged to extendlengthwise of said frame and means whereby the lengthwise extension ofsaid jack effects the vertical separation of said frames, said ack lyingsubstantially parallel to said frames when said upper frame is inlowered position. l

27. In an elevating truck, in combination, a truck base coi'iiprising anopen frame, an upper frame movable into' different positions ofelevation with respect to said base frame, and means for effecting theelevation of said upper frame comprising a laterally rigid. jack mountedupon one of said frames within the sides thereof and arranged to extendlengthwise thereof, means whereby the lengthwise extension of said jackeffects the vertical separation of said fra-mes, and means for eectingthe extension of said jack comprising a lever fulcrumed on one of saidframes.

28. 4In an elevating truck, in combination, a base comprising an' openframe, an upper i frame supported upon said base frame and arranged tobe moved into different positions of elevation-with respect thereto, alaterally rigid jack mounted upon said base frame between the sidesVthereof and arranged to extend lengthwise thereof, and

means for causin the extension of said jack.

to effect a vertica separation of said frames, comprising connectionsbetween which said jack isvconstructed to telescope.

29. In an elevating truck, in combination, a base comprising an openframe, an upper frame supportedl upon said base frame and arranged to bemoved into different positions of elevation with yrespect thereto, alaterally rigid jack mounted upon said base frame between the sidesthereof and arranged to extend lengthwise thereof, means for causing theextension of said jack to effect a vertical separation of said frames,comprising connections between which said jack is constructed totelescope, a pivoted truck handle and connections between said ,havingits members respectively Yeo 30. In an elevating truck, in combination,a base comprising an open frame, an upper frame supported upon said baseframe and arranged to be moved into different positions of elevationwith respect thereto, a laterally'rigid jack mounted upon said baseframe between the sides thereof and arranged to extend lengthwisethereof, means for causing the extension of said jack to eii'ect avertical separation of said frames, comprising connections between whichsaid jack is constructed to telescope, a pivoted truck handle, meanswhereby said truck handle may be connected at will to said jack toeffect the extension thereof, and other.

means for effecting the release of said jack.

4 31. In an elevating truck, in combination, a pair of sup ortingwheels, an axle upon which said w ieels are mounted, an open framecarried by said4`V axle between said wheels, a third supporting wheelmounted at the forward end of said frame to swing about a substantiallyvertical axis for steering said truck, an upper frame supported by saidfirst mentioned frame Vand arranged to be moved into different positionsof elevation with respect thereto, means for effecting the elevation ofsaid frame comprising a laterally rigid fluid-operated jack mountedbetween the sides of said first-mentioned frame and arranged to extendlengthwise thereof, a supplying operating lfluid thereto, meansWherebythe extension of said jack effects the vertical separation ofsaid frames, a draft and steering handle pivotally mounted upon saidtruck, and connections between said pump and said handle for effectingthe extension of said jack.

32. In an elevating truck, in combination with supporting wheels,elevating mechanism comprising horizontally extending, verticallyseparable parts, means for maintaining the parallelism of s aid partsduring their relative movements of approach and separation, and a jacklocated between and extensible lengthwise of said parts, said ackdirectly pivoted to said parts and being wholly supported by andarranged to telescope between,

said pivotal connections.

33. In an elevating truck, in combination with supporting wheels,elevating mechanism comprising horizontally extending, verticallyseparable parts, means for maintaining the parallelism of said partsduring their relative movements of approach and separation, a jacklocated between and extensible 'lengthwise of said parts, said jackhaving its members respectively directly pivoted to said parts and beingwholly sup- -ported by and arranged -to telescope between 'said pivotalconnections, and means for effecting the extension of said Jackcomprlsing a leverV pivoted upon one of said parts pump carried by saidvjack forand so connected 4to said jack as to permit movement of saidjack relative to said parts during the relative movement of said parts.

34. In an elevating truck, in combination with supporting wheels,elevating mechanism comprising horizontally extending, verticallyseparable parts, means for maintaining the parallelism of said partsduring their relative movements of approach and separation, a jacklocated between and extensible lengthwise of said parts, said jackhaving its members respectively directly pivoted to said parts and beingwholly supported by and arranged to telescope between said pivotalconnections, and means for effecting the extension of said jack.comprising a lever pivoted upon one of said parts and so connected tosaid jack as to permit movement of said jack relative to said partsduring the relative movement of said parts, said lever being arranged toserve means for maintainii'ig the parallelism of said frames duringtheir relative movements of approach and separation, and a Jack havingits members respectively dlrectly pivoted to said frames and extensiblelengthwise thereof, said jack being wholly supported by and arranged totelescope be-a tween said pivotal connections and being arranged to moveinto substantial horizontal parallelism to said frames when saidelevating mechanism is in its lowered condition. n

37. In an elevating truck, in combination with supporting wheels,elevating mechanism comprising horizontally extending, verticallyseparable telescoping frames, means for maintaining the parallelism ofsaid frames during their relative movements of approach and separation,and a jack having its members respectively' directly pi voted to saidframes and extensible lel'igthwise thereof, said jack being whollysupported by and arranged to telescope be-4 tween said pivotalconnections and being arranged to lie within the sides of said frameswhen in telescoped condition and in substantial horizontal parallelismthereto.

38. In an elevating truck, in combination with supporting wheels, anelevating mechanism comprising horizontally displaceable and verticallyseparable parts, means between said parts whereby an application offorce substantially lengthwise of said parts to effect a horizontaldisplacement thereof also effects a vertical separation thereof insubstantial parallelism, a piston and a cylinder in which said piston isconfined for rectilinear movement relative to said cylinder, said pistonand cylinder being respectively so pivotally connected to saidhorizontally displaceabl'el and vertically separable parts that theaforementioned rectilinear relative movement between the piston andcylinder is substantially lengthwise of the truck, and said piston andcylinder being 'wholly supported by and arranged to telescope betweenthe said pivotal connections and lying substantially horizontal when theparts are in lowered condition.

39; In an elevating truck, in combination, a base and an upper frame,means whereby relative lengthwise movement of said base and said frameeffects the separation thereof, a piston and a cylinder in which saidpiston is. confined for relative rectilinear movement, one of said partsbeing pivotally connected to said base and the other to the upper frameat points so .spaced lengthwise of the truck that the relativerectilinear movement of said piston and said cylinder is substantiallylengthwise of the truck, said piston and cylinder being wholly supportedby, and arranged to telescope between, said pivotal connections.

40. In an elevating truck, in combination with supporting wheels, anelevating mechanism comprising horizontally extending upper and lowerparts, means between said parts whereby an application of forcesubstantially lengthwise of said parts effects a vertical separationthereof in substantial parallelism, a cylinder having a piston confinedtherein for rectilinear movement, said cylinder and piston beingarranged lto eX- tend lengthwise of said truck and to lie wholly betweensaid upper and lower parts for operatively controlling the descent ofsaid upper part upon said lower part.

41. In an elevating truck, in combination.

with supporting wheels, an elevating mechanism comprising horizontallylextending vertically separable parts, means between said parts wherebyan application of force substantially lengthwise of said parts effects avertical separation thereof in substantial parallelism, a cylinderhaving a piston confined therein for rectilinear movement, said pistonand cylinder being respectively pivotally supported each at its outerend between said vertically separable parts and arranged to extendlengthwise of said truck so that the rectilinear movement between saidpiston and cylinder is substantially lengthwise ofvsaid truck, saidpiston and lcylinder being wholly .supported between their pivotalsupports and arranged to telescope betweenthe same and to lievsubstantially in horizontal position when the parts are in loweredcondition.

Signed at Holyoke,'Mass., this 24 day of April, 1913.

DANIEL E( HENNESSY. Witnesses:

ARTHUR L. LEWIS, Gno. R. BURKHARDT.

It is hereby certied that in Letters Patent No. 1,201,180, grantedOctober l0, 1916, npon the application of Daniel E. Hennessy, ofHolyoke, Massachusetts, for an improvamont in Elevating-'Irucks, anerror appears in the printed specification requiring correction asfollows: hago 6, lines 5253, claim 9, for the word connections readpoints and being; and that the said Letters Patent should bo read withthis correction therein that the same may conform to the record of the.case in the Patent Office.

signed ma ded this am dry of october, A. D., 191s.

[man] R. F. WHITEHEAD,

Cl. 254-10. Acting bmms'ufonefrcj'Patenu;

